CN108695956B - Wireless charging and communication circuit and wireless electronic equipment - Google Patents

Wireless charging and communication circuit and wireless electronic equipment Download PDF

Info

Publication number
CN108695956B
CN108695956B CN201810530497.6A CN201810530497A CN108695956B CN 108695956 B CN108695956 B CN 108695956B CN 201810530497 A CN201810530497 A CN 201810530497A CN 108695956 B CN108695956 B CN 108695956B
Authority
CN
China
Prior art keywords
circuit
electrically connected
feedback
signal
capacitor
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
CN201810530497.6A
Other languages
Chinese (zh)
Other versions
CN108695956A (en
Inventor
程鑫轶
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
BOE Technology Group Co Ltd
Original Assignee
BOE Technology Group Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by BOE Technology Group Co Ltd filed Critical BOE Technology Group Co Ltd
Priority to CN201810530497.6A priority Critical patent/CN108695956B/en
Publication of CN108695956A publication Critical patent/CN108695956A/en
Priority to US16/622,534 priority patent/US11398745B2/en
Priority to PCT/CN2019/075398 priority patent/WO2019227977A1/en
Application granted granted Critical
Publication of CN108695956B publication Critical patent/CN108695956B/en
Priority to US17/741,557 priority patent/US11923717B2/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Classifications

    • H02J7/025—
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/02—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries for charging batteries from ac mains by converters
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J50/00—Circuit arrangements or systems for wireless supply or distribution of electric power
    • H02J50/10—Circuit arrangements or systems for wireless supply or distribution of electric power using inductive coupling
    • H02J50/12—Circuit arrangements or systems for wireless supply or distribution of electric power using inductive coupling of the resonant type
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
    • G06K19/00—Record carriers for use with machines and with at least a part designed to carry digital markings
    • G06K19/06—Record carriers for use with machines and with at least a part designed to carry digital markings characterised by the kind of the digital marking, e.g. shape, nature, code
    • G06K19/067—Record carriers with conductive marks, printed circuits or semiconductor circuit elements, e.g. credit or identity cards also with resonating or responding marks without active components
    • G06K19/07—Record carriers with conductive marks, printed circuits or semiconductor circuit elements, e.g. credit or identity cards also with resonating or responding marks without active components with integrated circuit chips
    • G06K19/0701—Record carriers with conductive marks, printed circuits or semiconductor circuit elements, e.g. credit or identity cards also with resonating or responding marks without active components with integrated circuit chips at least one of the integrated circuit chips comprising an arrangement for power management
    • G06K19/0707—Record carriers with conductive marks, printed circuits or semiconductor circuit elements, e.g. credit or identity cards also with resonating or responding marks without active components with integrated circuit chips at least one of the integrated circuit chips comprising an arrangement for power management the arrangement being capable of collecting energy from external energy sources, e.g. thermocouples, vibration, electromagnetic radiation
    • G06K19/0708—Record carriers with conductive marks, printed circuits or semiconductor circuit elements, e.g. credit or identity cards also with resonating or responding marks without active components with integrated circuit chips at least one of the integrated circuit chips comprising an arrangement for power management the arrangement being capable of collecting energy from external energy sources, e.g. thermocouples, vibration, electromagnetic radiation the source being electromagnetic or magnetic
    • G06K19/071—Record carriers with conductive marks, printed circuits or semiconductor circuit elements, e.g. credit or identity cards also with resonating or responding marks without active components with integrated circuit chips at least one of the integrated circuit chips comprising an arrangement for power management the arrangement being capable of collecting energy from external energy sources, e.g. thermocouples, vibration, electromagnetic radiation the source being electromagnetic or magnetic the source being a field other than an interrogation field, e.g. WLAN, cellular phone network
    • H02J5/005—
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J50/00—Circuit arrangements or systems for wireless supply or distribution of electric power
    • H02J50/10—Circuit arrangements or systems for wireless supply or distribution of electric power using inductive coupling
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J50/00—Circuit arrangements or systems for wireless supply or distribution of electric power
    • H02J50/80—Circuit arrangements or systems for wireless supply or distribution of electric power involving the exchange of data, concerning supply or distribution of electric power, between transmitting devices and receiving devices
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M3/00—Conversion of dc power input into dc power output
    • H02M3/22—Conversion of dc power input into dc power output with intermediate conversion into ac
    • H02M3/24—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters
    • H02M3/28—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac
    • H02M3/325—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal
    • H02M3/335—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only

Abstract

The embodiment of the invention provides a wireless charging and communication circuit and wireless electronic equipment, which comprise a receiving circuit and a signal processing circuit which are electrically connected; the receiving circuit is used for receiving the electric energy wirelessly transmitted by the transmitting circuit and wirelessly transmitting a feedback signal to the transmitting circuit according to the electric energy; and the signal processing circuit is used for receiving the control signal which is generated according to the feedback signal and is wirelessly transmitted by the transmitting circuit and processing the control signal. The embodiment of the invention can supply power to the receiving circuit according to the charging instruction, realize two-way data communication based on the transmitting circuit and the receiving circuit while charging, facilitate the real-time understanding of the charging state and realize the data transmission while charging.

Description

Wireless charging and communication circuit and wireless electronic equipment
Technical Field
The invention relates to the technical field of electronics, in particular to a wireless charging and communication circuit and wireless electronic equipment.
Background
The passive electronic tag (also called passive tag) is not provided with a built-in battery, and is in a passive state when the reading range of the reader is out, and can be wirelessly charged by the wireless charging circuit when the reading range of the reader is in.
In the prior art, communication cannot be generally carried out while a passive electronic tag is charged, and the current charging state cannot be known in time; communication can be realized in a few cases, but the circuit structure is complex, unidirectional communication can be realized generally, and bidirectional communication cannot be realized.
In addition, most of the existing wireless charging circuits are set according to the Qi standard, and the compatibility of the charging situations except the Qi standard is poor, so that a lot of inconvenience is brought to practical use.
Disclosure of Invention
The invention provides a wireless charging and communication circuit and wireless electronic equipment aiming at the defects of the existing mode, and aims to solve the problems that in the prior art, a passive electronic tag cannot be communicated or can only be communicated in a one-way mode while being wirelessly charged, and the compatibility is poor in different charging application scenes.
According to one aspect, embodiments of the present invention provide a wireless charging and communication circuit,
the device comprises a receiving circuit and a signal processing circuit which are electrically connected;
the receiving circuit is used for receiving the electric energy wirelessly transmitted by the transmitting circuit and wirelessly transmitting a feedback signal to the transmitting circuit according to the electric energy;
and the signal processing circuit is used for receiving the control signal which is generated according to the feedback signal and is wirelessly transmitted by the transmitting circuit and processing the control signal.
Further, the receiving circuit includes: the first energy storage unit, the first capacitor, the rectifying circuit and the feedback circuit;
the first end of the first energy storage unit is electrically connected with the first end of the first capacitor, and the second end of the first energy storage unit is electrically connected with the first end of the rectifying circuit and used for receiving electric energy wirelessly transmitted by the transmitting circuit;
the second end of the first capacitor is electrically connected with the second end of the rectifying circuit;
the third end of the rectifying circuit is grounded and used for converting the electric energy into direct-current voltage and outputting the direct-current voltage to the feedback circuit;
and the feedback circuit is electrically connected with the rectifying circuit and used for generating a feedback signal according to the direct-current voltage and transmitting the feedback signal to the transmitting circuit.
Further, the feedback circuit includes: the load modulation control circuit comprises a load modulation control end, a first switch unit, a load modulation resistor and a load resistor;
the load modulation control end is electrically connected with the first end of the first switch unit;
the second end of the first switch unit is electrically connected with the first end of the load modulation resistor, the third end of the first switch unit is grounded, and the first switch unit is used for receiving a load modulation signal which is input by the load modulation control end and is used for modulating the load modulation signal and conducting the circuit according to the modulation signal;
the first end of the load resistor is electrically connected with the second end of the load modulation resistor and the rectifying circuit, and the second end of the load resistor is grounded;
and the load modulation resistor and the load resistor are used for modulating the resistance value of the feedback circuit according to the on-off of the first switch unit to form a feedback signal.
Further, the feedback circuit includes: the load modulation control end, the second switch unit, the load modulation capacitor and the matching capacitor;
the load modulation control end is electrically connected with the first end of the second switch unit;
the second end of the second switch unit is electrically connected with the first end of the load modulation capacitor, and the third end of the second switch unit is grounded;
the first end of the matching capacitor is electrically connected with the second end of the first capacitor, and the second end of the matching capacitor is electrically connected with the second end of the first energy storage unit.
Further, the signal processing circuit comprises a decoding circuit, and the decoding circuit is electrically connected with the receiving circuit;
and the decoding circuit is used for receiving the control signal generated according to the feedback signal and transmitted by the transmitting circuit and decoding the control signal.
Further, the decoding circuit includes: the circuit comprises a first signal input end, a second signal input end, a high-pass filter circuit, a switch circuit, a third capacitor, a resistance-capacitance charging circuit, a comparison circuit, a fourth capacitor and a signal output end;
the first signal input end is electrically connected with the receiving circuit and used for receiving the control signal transmitted by the transmitting circuit;
the first end of the high-pass filter circuit is electrically connected with the first signal input end, and the second end of the high-pass filter circuit is electrically connected with the first end of the switch circuit;
the second end of the switch circuit is electrically connected with the comparison circuit, and the third end of the switch circuit is grounded;
the first end of the third capacitor is electrically connected with the second signal input end, and the second end of the third capacitor is grounded;
the first end of the resistance-capacitance charging circuit is electrically connected with the second signal input end, and the second end of the resistance-capacitance charging circuit is grounded;
the comparison circuit is electrically connected with the resistance-capacitance charging circuit, the second signal input end and the first signal output end and is grounded;
the first end of the fourth capacitor is electrically connected with the signal output end, and the second end of the fourth capacitor is grounded.
Further, the comparison circuit comprises a comparator and a logic negation circuit; the decoding circuit also comprises a resistance voltage division circuit;
the same-direction end of the comparator is electrically connected with the second end of the switch circuit, the reverse end of the comparator is electrically connected with the resistance voltage-dividing circuit, the power supply end of the comparator is electrically connected with the second signal input end, and the output end of the comparator is electrically connected with the first input end of the logic negation circuit;
the second input end of the logic negation circuit is electrically connected with the second signal input end, and the output end of the logic negation circuit is electrically connected with the first signal output end;
the first end of the resistance voltage division circuit is electrically connected with the second signal input end, and the second end of the resistance voltage division circuit is grounded.
Furthermore, the comparison circuit comprises a trigger circuit, and the decoding circuit also comprises a fifth capacitor;
the low trigger end and the high trigger end of the trigger circuit are both electrically connected with the second end of the switch circuit, the power supply end and the zero clearing end are both electrically connected with the second signal input end, the control end is electrically connected with the first end of the fifth capacitor, the discharge end and the grounding end are both grounded, and the output end is electrically connected with the first signal output end;
and the second end of the fifth capacitor is grounded.
Embodiments of the present invention also provide, according to another aspect, a wireless electronic device, including: the wireless charging and communication circuit comprises a main controller, a communication controller, a power receiving controller and the wireless charging and communication circuit according to the embodiment of the invention;
the main controller and the communication controller are electrically connected with the wireless charging and communication circuit; the power receiving controller is electrically connected with the main controller.
According to yet another aspect, an embodiment of the present invention further provides a wireless charging and communication circuit, including: a transmitting circuit;
the transmitting circuit is used for wirelessly transmitting electric energy to the receiving circuit, receiving a feedback signal of the receiving circuit and wirelessly transmitting a control signal generated according to the feedback signal to the receiving circuit;
the transmission circuit includes: the control circuit is electrically connected with a power supply outside the charging and communication circuit.
Further, the control circuit includes: the third energy storage unit, the unidirectional conduction unit, the third switching unit, the feedback detection resistor, the load modulation feedback end and the third signal input end;
the first end of the third energy storage unit is connected with the power supply, and the second end of the third energy storage unit is electrically connected with the first end of the second energy storage unit;
the first end of the unidirectional conduction unit is electrically connected with the second end of the second energy storage unit, and the second end of the unidirectional conduction unit is electrically connected with the first end of the third energy storage unit;
the first end of the third switching unit is electrically connected with the second end of the second energy storage unit, the second end of the third switching unit is electrically connected with the first end of the feedback detection resistor and the load modulation feedback end, and the third end of the third switching unit is electrically connected with the third signal input end; the third switching unit is used for controlling the on-off of the circuit according to the charging control signal input by the third signal input end;
the second end of the feedback detection resistor is grounded.
Furthermore, the third switching unit is a field effect transistor, and the first end, the second end and the third end of the third switching unit are respectively a drain electrode, a source electrode and a grid electrode of the field effect transistor;
the unidirectional conduction unit is a diode, and the first end and the second end of the unidirectional conduction unit are respectively the anode and the cathode of the diode.
Further, the control circuit includes: the load modulation circuit comprises a fourth switching unit, a fourth signal input end, a fifth switching unit, a fifth signal input end, a third energy storage unit, a feedback detection resistor and a load modulation feedback end;
the first end of the fourth switch unit is electrically connected with the power supply, the second end of the fourth switch unit is electrically connected with the first end of the third energy storage unit, and the third end of the fourth switch unit is electrically connected with the fourth signal input end and used for controlling the on-off of the circuit according to the first charging control signal input by the fourth signal input end;
the first end of the fifth switch unit is electrically connected with the second end of the fourth switch unit, the second end of the fifth switch unit is electrically connected with the first end of the feedback detection resistor, and the third end of the fifth switch unit is electrically connected with the fifth signal input end and used for controlling the on-off of the circuit according to a second charging control signal input by the fifth signal input end;
the first end of the feedback detection resistor is electrically connected with the load modulation feedback end, and the second end of the feedback detection resistor is grounded and used for responding to the feedback signal transmitted by the receiving circuit and outputting the feedback signal through the load modulation feedback end;
the second end of the third energy storage unit is connected with the first end of the second energy storage unit, and the second end of the second energy storage unit is grounded.
Furthermore, the fourth switch unit is a field effect transistor, and the first end, the second end and the third end of the fourth switch unit are respectively a drain electrode, a source electrode and a grid electrode of the field effect transistor;
the fifth switch unit is a field effect transistor, and the first end, the second end and the third end of the fifth switch unit are respectively a drain electrode, a source electrode and a grid electrode of the field effect transistor.
Embodiments of the present invention also provide, according to yet another aspect, a wireless electronic device, including: the wireless charging and communication circuit comprises a power supply, a main controller, a communication controller, a power supply controller and the wireless charging and communication circuit according to the embodiment of the invention;
the power supply, the main controller, the communication controller and the power supply controller are all electrically connected with the wireless charging and communication circuit.
Compared with the prior art, the embodiment of the invention at least has the following beneficial effects:
1) the receiving circuit can be powered according to the charging instruction, and bidirectional data communication based on the transmitting circuit and the receiving circuit can be realized while charging, so that the charging state can be known in real time, and data transmission can be completed while charging;
2) the circuit structure is simple, better compatibility can be realized through simple parameter modification, the circuit structure is suitable for charging scenes under the Qi standard and non-standard charging scenes, and the use experience of users can be improved;
3) when the wireless charging and communication circuit is applied to an electronic tag with an electronic ink screen, based on the function of bidirectional data communication, the wireless charging and communication circuit provided by the embodiment of the invention can realize power supply only when the electronic ink screen needs to refresh the screen, so that energy can be saved.
Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention.
Drawings
The foregoing and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
fig. 1 is a schematic structural diagram of a wireless charging and communication circuit according to an embodiment of the present invention;
fig. 2 is a schematic circuit diagram of a receiving circuit according to an embodiment of the present invention;
fig. 3 is a schematic circuit diagram of another receiving circuit according to an embodiment of the present invention;
fig. 4 is a schematic circuit diagram of a receiving circuit according to another embodiment of the present invention;
fig. 5 is a schematic circuit diagram of a decoding circuit according to an embodiment of the present invention;
FIG. 6 is a schematic circuit diagram of another decoding circuit according to an embodiment of the present invention;
fig. 7 is a schematic structural diagram of another wireless charging and communication circuit according to an embodiment of the present invention;
fig. 8 is a schematic circuit diagram of a transmitting circuit according to an embodiment of the present invention;
fig. 9 is a schematic circuit diagram of another transmitting circuit according to an embodiment of the present invention.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are illustrative only and should not be construed as limiting the invention.
As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms "comprises" and/or "comprising," when used in this specification, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof. It will be understood that when an element is referred to as being "connected" or "coupled" to another element, it can be directly connected or coupled to the other element or intervening elements may also be present. Further, "connected" or "coupled" as used herein may include wirelessly connected or wirelessly coupled. As used herein, the term "and/or" includes all or any element and all combinations of one or more of the associated listed items.
It will be understood by those skilled in the art that, unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. It will be further understood that terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the prior art and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein.
As will be appreciated by those skilled in the art, a "terminal" as used herein includes both devices having a wireless signal receiver, which are devices having only a wireless signal receiver without transmit capability, and devices having receive and transmit hardware, which have devices having receive and transmit hardware capable of two-way communication over a two-way communication link. Such a device may include: a cellular or other communication device having a single line display or a multi-line display or a cellular or other communication device without a multi-line display; PCS (Personal Communications Service), which may combine voice, data processing, facsimile and/or data communication capabilities; a PDA (Personal Digital Assistant), which may include a radio frequency receiver, a pager, internet/intranet access, a web browser, a notepad, a calendar and/or a GPS (Global Positioning System) receiver; a conventional laptop and/or palmtop computer or other device having and/or including a radio frequency receiver. As used herein, a "terminal" or "terminal device" may be portable, transportable, installed in a vehicle (aeronautical, maritime, and/or land-based), or situated and/or configured to operate locally and/or in a distributed fashion at any other location(s) on earth and/or in space. As used herein, a "terminal Device" may also be a communication terminal, a web terminal, a music/video playing terminal, such as a PDA, an MID (Mobile Internet Device) and/or a Mobile phone with music/video playing function, or a smart tv, a set-top box, etc.
Example one
In order to solve the problem that bidirectional communication cannot be performed while charging, an embodiment of the present invention provides a wireless charging and communication circuit, which has a structure as shown in fig. 1 and includes a receiving circuit and a signal processing circuit that are electrically connected, where the receiving circuit is connected to a transmitting circuit (other than the wireless charging and communication circuit to which the receiving circuit belongs) through a wireless signal.
The receiving circuit and the signal processing circuit can be arranged in a device to be charged, such as an electronic tag with an electronic ink screen; the receiving circuit is used for receiving electric energy wirelessly transmitted by the transmitting circuit and wirelessly transmitting a feedback signal to the transmitting circuit according to the electric energy, and the signal processing circuit is used for receiving a control signal which is generated according to the feedback signal and wirelessly transmitted by the transmitting circuit and carrying out corresponding signal processing on the control signal so that the control signal can be suitable for corresponding equipment to be charged.
Referring to fig. 2 to 4, in a preferred embodiment, the receiving circuit includes: the first energy storage unit, first electric capacity, rectifier circuit and feedback circuit.
The first end of the first energy storage unit is electrically connected with the first end of the first capacitor, the second end of the first energy storage unit is electrically connected with the first end of the rectifying circuit, and the first energy storage unit is used for receiving electric energy wirelessly transmitted by the transmitting circuit.
The second end of the first capacitor is electrically connected with the second end of the rectifying circuit.
The third end of the rectifying circuit is grounded, and the rectifying circuit is used for converting electric energy into direct-current voltage and outputting the direct-current voltage to the feedback circuit.
And the feedback circuit is electrically connected with the rectifying circuit and used for generating a feedback signal according to the direct-current voltage and transmitting the feedback signal for feeding back the current charging state to the transmitting circuit, and the specific feedback principle of the feedback circuit will be detailed in the subsequent part.
The following takes the circuit shown in fig. 2 as an example to further explain the charging and discharging principle of the receiving circuit in the embodiment of the present invention:
in fig. 2, the first energy storage unit is an inductance coil (hereinafter referred to as "receiving inductance"), and the first capacitor is a capacitor C102; the receiving inductor is coupled with the transmitting inductor so as to receive electric energy wirelessly transmitted by the transmitting inductor and output direct-current voltage through the rectifying circuit for the equipment to be charged to use.
Further, the feedback mode of the feedback circuit includes resistance feedback and capacitance feedback.
When the feedback circuit of the embodiment of the present invention adopts a resistance feedback manner, in a preferred embodiment, the feedback circuit includes: the load modulation circuit comprises a load modulation control end, a first switch unit, a load modulation resistor and a load resistor.
The load modulation control end is electrically connected with the first end of the first switch unit; the second end of the first switch unit is electrically connected with the first end of the load modulation resistor, the third end of the first switch unit is grounded, and the first switch unit is used for receiving a load modulation signal which is input by the load modulation control end and used for modulation and conducting the circuit according to the modulation signal.
The first end of the load resistor is electrically connected with the second end of the load modulation resistor and the rectifying circuit, and the second end of the load resistor is grounded; and the load modulation resistor and the load resistor are used for modulating the resistance value of the feedback circuit according to the on-off of the first switch unit to form a feedback signal.
The feedback principle of the feedback circuit is further explained below by taking the circuit shown in fig. 2 as an example:
in fig. 2, the first switch unit is a Metal-Oxide-Semiconductor Field-Effect Transistor (MOS fet) Q102, and a first end, a second end, and a third end of the first switch unit are a gate, a drain, and a source of the MOS Q102, respectively; the load resistor is a resistor RL and the load modulation resistor is a resistor R102.
When the load modulation signal received by the drain of the MOS transistor Q102 is at a high level, the MOS transistor Q102 is turned on, the load modulation resistor R102 is connected in parallel with the load resistor RL, and the actual load resistance value of the receiving circuit is the resistance value of the load modulation resistor R102 connected in parallel with the load resistor RL; when the load modulation signal received by the drain of the MOS transistor Q102 is at a low level, the MOS transistor Q102 is turned off, and the actual load resistance value of the receiving circuit is the resistance value of the load resistor RL.
Therefore, when the load modulation signal changes between a high level and a low level, the actual load resistance value of the receiving circuit changes between two different resistance values, so that the voltages at two ends of the inductance coil in the receiving circuit change; because the inductance coil of the receiving circuit is coupled with the inductance coil of the transmitting circuit, when the voltage at two ends of the inductance coil in the receiving circuit changes, the voltage at two ends of the inductance coil of the transmitting circuit also changes; the voltage change at the two ends of the transmitting inductor can cause the change of the current of the feedback detection resistor, and a feedback signal for feeding back the current change is transmitted to the main controller from the load modulation feedback end, so that the feedback process is completed.
In order to better meet the actual requirements of users, the resistance value of the resistor in the embodiment of the invention can be set according to the actual requirements, and the feedback circuit can be simultaneously connected with a plurality of groups of first switch units and load modulation resistors in parallel.
The feedback circuit shown in fig. 2 can be applied to various non-standard application scenarios, and can meet personalized use requirements. In order to achieve the purpose of compatibility between Qi standard and non-standard, the feedback circuit shown in fig. 2 is adopted, and a matching capacitor, such as the capacitor C103 shown in fig. 3, is electrically connected to the receiving circuit of the embodiment of the present invention.
When the feedback circuit of the embodiment of the present invention adopts a capacitive feedback manner, in a preferred embodiment, the feedback circuit includes: the load modulation circuit comprises a load modulation control end, a second switch unit, a load modulation capacitor and a matching capacitor.
The load modulation control end is electrically connected with the first end of the third switching unit; the second end of the third switching unit is electrically connected with the first end of the load modulation capacitor, the third end of the third switching unit is grounded, and the third switching unit is used for receiving a load modulation signal which is input by the load modulation control end and used for modulation and conducting the circuit according to the modulation signal.
The first end of the matching capacitor is electrically connected with the second end of the first capacitor, and the second end of the matching capacitor is electrically connected with the second end of the first energy storage unit.
The feedback principle of the feedback circuit is described below by taking the circuit shown in fig. 4 as an example:
in fig. 4, the third switching unit is a MOS transistor Q103, and a first end, a second end, and a third end of the third switching unit are respectively a gate, a drain, and a source of the MOS transistor Q103; the matching capacitor is a capacitor C103, and the load modulation capacitor is a capacitor C110.
When the load modulation signal received by the drain of the MOS transistor Q103 is at a high level, the MOS transistor Q103 is turned on, the load modulation capacitor C110 is connected in parallel with the matching capacitor C103, and the actual capacitance value of the receiving circuit is the capacitance value after the load modulation capacitor C110 is connected in parallel with the matching capacitor C103; when the load modulation signal received by the drain of the MOS transistor Q103 is at a low level, the MOS transistor Q103 is turned off, and the actual capacitance value of the receiving circuit is the capacitance value of the matching capacitor C103.
Therefore, when the capacitance load modulation signal changes between a high level and a low level, the actual capacitance value of the receiving circuit changes between two different capacitance values, so that the voltages at two ends of the inductance coil in the receiving circuit change; because the inductance coil of the receiving circuit is coupled with the inductance coil of the transmitting circuit, when the voltage at two ends of the inductance coil in the receiving circuit changes, the voltage at two ends of the inductance coil of the transmitting circuit also changes; the voltage change at the two ends of the transmitting inductor can cause the change of the current of the feedback detection resistor, and a feedback signal for feeding back the current change is transmitted to the main controller from the load modulation feedback end, so that the feedback process is completed.
In order to better meet the actual requirements of users, the capacitance value of the capacitor in the embodiment of the invention can be selected according to the actual requirements, and the feedback circuit can be simultaneously connected in parallel with a plurality of groups of third switching units and load modulation capacitors.
In another preferred embodiment, the feedback circuit includes: the load modulation control terminal, the first switch unit, the load modulation capacitor and the load resistor, that is, the load modulation capacitor is used to replace the load modulation resistor in fig. 2 or fig. 3. The connection relationship and the feedback principle of the feedback circuit are similar to those of the circuit shown in fig. 1, and are not described herein again.
In another preferred embodiment, a sixth switching unit, such as an MOS transistor, may be connected to the branch where the feedback capacitor is located, and the modulation signal received by the sixth switching unit controls the on/off of the circuit to which the feedback capacitor belongs, and the modulation signal is turned on when the modulation signal is at a high level and turned off when the modulation signal is at a low level, so that the capacitance value of the receiving circuit changes along with the change of the modulation signal, the voltage at the two ends of the receiving inductor changes along with the change of the modulation signal, and further the feedback detection resistance changes through the transmitting inductor.
Preferably, the rectifier circuit in the embodiment of the present invention includes: the connection relationship of the first rectifying unit (such as the diode D102 shown in fig. 1), the second rectifying unit (such as the diode D103 shown in fig. 1), the third rectifying unit (such as the diode D104 shown in fig. 1), the fourth rectifying unit (such as the diode D105 shown in fig. 1) and the sixth capacitor (such as the capacitor C104 shown in fig. 1) is shown in fig. 1.
In a preferred embodiment, the signal processing circuit comprises a decoding circuit electrically connected to the receiving circuit for receiving the control signal generated from the feedback signal and transmitted by the transmitting circuit and decoding the control signal. Further, the signal processing circuit of the embodiment of the present invention includes a decoding circuit as shown in fig. 5 or fig. 6.
Preferably, as shown in fig. 5 or fig. 6, the decoding circuit includes: a first signal input terminal (e.g., a signal in shown in fig. 5 or fig. 6), a second signal input terminal (e.g., a power supply + shown in fig. 5 or fig. 6), a high-pass filter circuit, a switch circuit, a third capacitor, a resistance-capacitance charging circuit (or RC charging circuit), a comparison circuit, a fourth capacitor, and a signal output terminal (e.g., a signal out shown in fig. 5 or fig. 6).
The first signal input end and the second signal input end are both electrically connected with the receiving circuit, and specifically, the first signal input end is electrically connected with the second end of the first capacitor, and is used for receiving the control signal transmitted by the transmitting circuit.
The first end of the high-pass filter circuit is electrically connected with the first signal input end, the second end of the high-pass filter circuit is electrically connected with the first end of the switch circuit, and the high-pass filter circuit is used for filtering the control signal and preventing the direct-current voltage from influencing the switch circuit. Further, the high-pass filter circuit includes a sixth capacitor (e.g., the capacitor C1 shown in fig. 5 or fig. 6) and a first resistor (e.g., the resistor R1 shown in fig. 5 or fig. 6), a first end of the capacitor C1 is electrically connected to the first signal input terminal, a second end of the capacitor C1 is electrically connected to the first end of the resistor R1 and the switch circuit, and a second end of the resistor R1 is grounded.
The second end of the switch circuit is electrically connected with the comparison circuit, the third end of the switch circuit is grounded, and the switch circuit is switched on or switched off according to different received signals so as to control the charging and discharging states of the resistance-capacitance charging circuit. Further, the switch circuit comprises a current-limiting resistor R2 and a transistor Q1, wherein a first end of the current-limiting resistor R2 is electrically connected with a first end of a capacitor C1, a second end of the current-limiting resistor R2 is electrically connected with a base of a transistor Q1, a collector of a transistor Q1 is electrically connected with the resistance-capacitance charging circuit and the comparison circuit, and an emitter of a transistor Q1 is grounded.
The first end of the third capacitor is electrically connected with the second signal input end, and the second end of the third capacitor is grounded.
The first end of the resistance-capacitance charging circuit is electrically connected with the second signal input end, the second end of the resistance-capacitance charging circuit is grounded and is also electrically connected with the collector of the transistor Q1, and the resistance-capacitance charging circuit can discharge electricity through the transistor Q1. Further, the circuit principle of the rc charging circuit can be seen in fig. 5, which includes a resistor R3 and a capacitor C3; the first end of the resistor R3 is electrically connected to the second signal input terminal, the second end is electrically connected to the first end of the capacitor C3, the collector of the transistor Q1 and the comparator circuit, and the second end of the capacitor C3 is grounded.
The comparison circuit is electrically connected with the resistance-capacitance charging circuit, the second signal input end and the collector of the transistor Q1 and is grounded; the first end of the fourth capacitor is electrically connected with the signal output end, and the second end of the fourth capacitor is grounded.
Preferably, the comparison circuit in the embodiment of the present invention may compare the received input signals and output the decoded signals.
Referring to fig. 5, in a preferred embodiment, the comparison circuit includes a comparator U1 and a logical negation circuit U2, which can accomplish the decoding of the signal according to the amplitude modulation method; the decoding circuit further comprises a resistance voltage division circuit. The logic negation circuit U2 may be a nand gate or an inverter (or referred to as inverter), and the like, and implements the function of signal negation.
The resistor voltage dividing circuit comprises a first voltage dividing resistor R4 and a second voltage dividing resistor R5 which are electrically connected, and the specific resistance values of R4 and R5 can be set according to actual requirements, or other voltage dividing resistors are additionally arranged. The first end of the first voltage-dividing resistor R4 is electrically connected with the second signal input end, and the second end is electrically connected with the first end of the second voltage-dividing resistor R5 and the reverse end of the comparator U1; the second terminal of the second voltage-dividing resistor R2 is grounded.
The same-direction end of the comparator U1 is electrically connected with the second end of the switch circuit, specifically, the collector of the transistor Q1; the reverse end of the comparator U1 is electrically connected with the resistance voltage dividing circuit, in particular, the second end of the first voltage dividing resistor R4; the power supply end is electrically connected with the second signal input end, the grounding end is grounded, and the output end is electrically connected with the first input end of the logic negation circuit U2; a second input end of the logic negation circuit U2 is electrically connected with a second signal input end, and an output end of the logic negation circuit U2 is electrically connected with a first signal output end; the first end of the resistance voltage division circuit is electrically connected with the second signal input end, and the second end of the resistance voltage division circuit is grounded.
The operation of the comparison circuit is further described below by taking the circuit shown in fig. 5 as an example:
the base of the transistor Q1 receives a control signal which is input by the first signal input end and is filtered by the high-pass filter circuit, and the transistor Q1 is switched on or off according to the frequency of the control signal; when the transistor Q1 is turned on or off, the RC charging circuit is in a discharging or charging state, the voltages at the two ends of the capacitor C3 are different in different states, the voltages received by the same-direction end of the comparator U1 electrically connected with the capacitor C3 are different, and the voltages output by the output end of the comparator U1 are also different; further, the output voltage of the logical negation circuit varies depending on the output voltage of the comparator U1.
Specifically, the comparator U1 compares the voltage received by its inverting terminal with a set threshold, and when the voltage received by the inverting terminal is higher than or equal to the set threshold, the output terminal of the comparator U1 outputs a low level signal to the logical inversion circuit U2, and when the voltage received by the inverting terminal is lower than the set threshold, the output terminal of the comparator U1 outputs a low level signal to the logical inversion circuit U2.
A first end of the logic negation circuit U2 receives a high level signal input by the second signal input end, and controls the signal output of the output end according to the signal received by the second end; when the second terminal of the logic negation circuit U2 receives the high level signal transmitted by the comparator U1, the output terminal thereof outputs a low level signal, and when the second terminal of the logic negation circuit U2 receives the low level signal transmitted by the comparator U1, the output terminal thereof outputs a high level signal, thereby realizing the negation of the signal, and outputting the decoded signal through the signal output terminal.
Referring to fig. 6, in another preferred embodiment, the comparing circuit includes a trigger circuit (or 555 timer), and the decoding circuit further includes a fifth capacitor. The trigger circuit is adopted to replace the comparator U1 and the logic negation circuit U2, so that the integration level of the circuit can be improved.
A low TRIGGER end (a TRIGGER end in fig. 6) and a high TRIGGER end (a THRESHOLD end in fig. 6) of the 555 timer are both electrically connected with the second end of the switch circuit, specifically, the TR end and the TH end are both electrically connected with a collector electrode of the transistor Q1; the control circuit is used for receiving the control signal amplified by the switch circuit.
A power supply end (VCC end in fig. 6) and a clear end (RESET end in fig. 6) of the 555 timer are both electrically connected with the second signal input end; and the power supply end is connected with the high level of the second signal input end.
A CONTROL end (CONTROL end in fig. 6) of the 555 timer is electrically connected with a first end of the fifth capacitor, and a second end of the fifth capacitor is grounded; the DISCHARGE terminal (DISCHARGE terminal in fig. 6) and the ground terminal (GND terminal in fig. 6) of the 555 timer are both grounded.
The output end of the 555 timer is electrically connected with the first signal output end and used for outputting the decoded low-level pulse signal.
Taking the circuit shown in fig. 6 as an example, the operation principle of the comparison circuit is as follows:
the base of the transistor Q1 receives a control signal which is input by the first signal input end and is filtered by the high-pass filter circuit, and the transistor Q1 is switched on or off according to the frequency of the control signal; the 555 timer and the RC charging circuit together form a schmitt trigger, wherein the RC charging circuit includes a resistor R3 and a capacitor C3, the resistor R3 and the capacitor C3 are both electrically connected to the transistor Q1, and the capacitor C3 is also electrically connected to the TR terminal or the TH terminal of the 555 timer (the detailed electrical connection relationship refers to the foregoing or fig. 6).
When the transistor Q1 is turned on or off at a certain switching frequency, the RC charging circuit switches between a discharging state and a charging state at the same frequency, and in different states, the voltage across the capacitor C3 is different, the voltage received by the TR terminal or TH terminal of the 555 timer electrically connected to the capacitor C3 is different, and the voltage output by the output terminal is also different.
Specifically, when the RC charging circuit is in the discharging state, the discharging speed of the capacitor C3 is faster, and therefore, the voltage across the capacitor C3 drops faster in a short time; further, when the switching frequency of the transistor Q1 is greater than the set frequency threshold, since the discharging frequency of the capacitor C3 is higher and the discharging speed is faster, the two ends of the capacitor C3 are kept at a lower voltage, and correspondingly, the voltage received by the TR end or the TH end of the 555 timer is also lower, and cannot reach the logic jump voltage, and at this time, the output end of the 555 timer outputs a high level signal.
If the switching frequency of the transistor Q1 is not greater than the frequency threshold, since the discharging frequency of the capacitor C3 is relatively low, the voltage across the capacitor C3 can reach and be maintained at a large voltage, and correspondingly, the voltage received by the TR terminal or the TH terminal of the 555 timer can also reach a logic jump voltage, and at this time, the output terminal of the 555 timer outputs a low level signal.
The 555 timer achieves the negation of the signals through the mode, and then the decoded signals are output through the signal output end.
Example two
Based on the same inventive concept, the embodiment of the present invention further provides a wireless charging and communication circuit, including: a transmitting circuit.
The transmitting circuit is wirelessly connected with the receiving circuit (except the wireless charging communication circuit to which the transmitting circuit belongs).
The transmitting circuit can be arranged in various charging devices such as a fixed terminal or a handheld terminal and the like and is used for wirelessly transmitting electric energy to the receiving circuit, receiving a feedback signal of the receiving circuit and wirelessly transmitting a control signal generated according to the feedback signal to the receiving circuit.
When the wireless charging and communication circuit provided by the embodiment of the invention is applied to a charging system of an electronic tag, the wireless charging and communication circuit starts to supply power to the electronic tag when receiving a screen refreshing instruction, and controls an electronic ink screen in the electronic tag to refresh a screen by using a control signal; when the method is applied to other scenes, corresponding data communication under the use scene can be realized through the transmission of the control signal.
Referring to fig. 7, in a preferred embodiment, the transmitting circuit includes: the control circuit and the second energy storage unit are electrically connected; the control circuit is electrically connected with a power supply outside the charging and communication circuit of the embodiment of the invention and is used for transmitting the electric energy of the power supply to the second energy storage unit, and the second energy storage unit is used for storing the electric energy and wirelessly transmitting the electric energy to the receiving circuit.
Preferably, the control circuit in the embodiment of the present invention includes: the load modulation circuit comprises a third switching unit, a third signal input end, a third energy storage unit, a one-way conduction unit, a feedback detection resistor and a load modulation feedback end.
The first end of the third switching unit is electrically connected with the second end of the second energy storage unit, the second end of the third switching unit is electrically connected with the first end of the feedback detection resistor and the load modulation feedback end, the third end of the third switching unit is electrically connected with the third signal input end, and the third switching unit is used for controlling the on-off of the circuit according to the charging control signal input by the third signal input end;
the first end of the third energy storage unit is connected with a power supply, and the second end of the third energy storage unit is electrically connected with the first end of the second energy storage unit; the third energy storage unit is used for: when the charging control signal is at a high level, the electric energy of the power supply is transmitted to the second energy storage unit, and when the charging control signal is at a low level, the electric energy released by the second energy storage unit is stored.
The first end of the unidirectional conduction unit is electrically connected with the second end of the second energy storage unit, and the second end of the unidirectional conduction unit is electrically connected with the first end of the third energy storage unit; when the charging control signal is at a low level, the unidirectional conducting unit enables the current to be conducted from the first end to the second end only.
The first end of the feedback detection resistor is electrically connected to the load modulation feedback end, and the second end of the feedback detection resistor is grounded, so as to detect the feedback signal sent by the receiving circuit.
The charge and discharge operation principle of the transmitting circuit in the embodiment of the present invention is further described below by taking the circuit shown in fig. 8 as an example:
in fig. 8, the second energy storage unit is an inductance coil (hereinafter referred to as "transmitting inductance"), the third energy storage unit is a capacitor C101, and the feedback detection resistor is a resistor R101; the third switching unit is an MOS transistor Q101, and at the moment, the first end, the second end and the third end of the third switching unit are respectively a drain electrode, a source electrode and a grid electrode of the MOS transistor Q101; the unidirectional conduction unit is a diode D101, and at the moment, the first end and the second end of the unidirectional conduction unit are respectively the anode and the cathode of the diode D101; the third signal input terminal is the control signal terminal shown in fig. 8.
The charging control signal input at the third signal input end is often a Pulse signal converted at a certain frequency, such as a PWM (Pulse Width Modulation) signal, when the charging control signal is at a high level, the MOS transistor Q101 is turned on, and its circuit is also turned on, and a power supply connected to the control circuit charges the transmitting inductor through the capacitor C101; when the charging control signal is at a low level, the MOS transistor Q101 is turned off, the circuit to which the MOS transistor Q101 belongs is turned off, the transmitting inductor, the diode D101, and the capacitor C101 form a discharging loop, and the transmitting inductor releases electric energy through the discharging loop.
Preferably, the control circuit in the embodiment of the present invention includes: the load modulation circuit comprises a fourth switching unit, a fourth signal input end, a fifth switching unit, a fifth signal input end, a third energy storage unit, a feedback detection resistor and a load modulation feedback end.
The first end of the fourth switching unit is electrically connected with the power supply, the second end of the fourth switching unit is electrically connected with the first end of the third energy storage unit, and the third end of the fourth switching unit is electrically connected with the fourth signal input end; the fourth switching unit is used for controlling the on/off of the circuit according to a first charging control signal input by a fourth signal input end, and specifically, the fourth switching unit is switched on when the first charging control signal is at a high level and switched off when the first charging control signal is at a low level.
The first end of the fifth switch unit is electrically connected with the second end of the fourth switch unit, the second end of the fifth switch unit is electrically connected with the first end of the feedback detection resistor, and the third end of the fifth switch unit is electrically connected with the fifth signal input end; the fifth switch unit is used for controlling the on/off of the circuit according to a second charging control signal input by a fifth signal input end, and specifically, the fifth switch unit is turned on when the second charging control signal is at a high level and turned off when the second charging control signal is at a low level.
The first end of the feedback detection resistor is electrically connected to the load modulation feedback end, and the second end of the feedback detection resistor is grounded, and is configured to respond to the feedback signal transmitted by the receiving circuit and output the feedback signal through the load modulation feedback end.
The second end of the third energy storage unit is connected with the first end of the second energy storage unit, and the second end of the second energy storage unit is grounded.
The charge and discharge operation principle of the transmitting circuit in the embodiment of the present invention is further explained below by taking the circuit shown in fig. 9 as an example:
in fig. 9, the second energy storage unit is an inductance coil (hereinafter referred to as "transmitting inductance"), the third energy storage unit is a capacitor C101, and the feedback detection resistor is a resistor R101; the fourth switching unit is an MOS transistor Q201, and the first end, the second end and the third end of the fourth switching unit are respectively a drain electrode, a source electrode and a grid electrode of the MOS transistor Q201; the fifth switching unit is an MOS transistor Q202, and the first end, the second end and the third end of the fifth switching unit are respectively a drain electrode, a source electrode and a grid electrode of the MOS transistor Q202; the fourth signal input terminal is the terminal accessed to the control signal 1 in fig. 9, and the fifth signal input terminal is the terminal accessed to the control signal 2 in fig. 9.
The first charging control signal input by the fourth signal input terminal and the second charging control signal input by the fifth signal input terminal are Pulse signals that are converted at a certain frequency, such as PWM (Pulse Width Modulation) signals.
When the first charging control signal is at a high level and the second charging control signal is at a low level, the MOS transistor Q201 is turned on, the circuit thereof is also turned on, the MOS transistor Q202 is turned off, and the power supply connected to the control circuit charges the inductor coil through the capacitor C101.
When the first charging control signal is at a low level and the second charging control signal is at a high level, the MOS transistor Q201 is turned off, the circuit thereof is turned off, the MOS transistor Q202 is turned on, the inductor coil, the MOS transistor Q202 and the capacitor C101 form a discharging loop, and the transmitting inductor releases electric energy through the discharging loop.
Based on the first embodiment and the second embodiment, the wireless charging and communication circuit provided by the embodiment of the invention at least has the following beneficial effects:
1) the receiving circuit can be powered according to the charging instruction, and bidirectional data communication based on the transmitting circuit and the receiving circuit can be realized while charging, so that the charging state can be known in real time;
2) the circuit structure is simple, better compatibility can be realized through simple parameter modification, the circuit structure is suitable for charging scenes under the Qi standard and non-standard charging scenes, and the use experience of users can be improved;
3) when the wireless charging and communication circuit is applied to an electronic tag with an electronic ink screen, based on the function of bidirectional data communication, the wireless charging and communication circuit provided by the embodiment of the invention can realize power supply only when the electronic ink screen needs to refresh the screen, so that energy can be saved.
EXAMPLE III
Based on the same inventive concept, a third embodiment of the present invention provides a wireless electronic device, including: the wireless charging and communication circuit comprises a main controller, a communication controller, a power receiving controller and the wireless charging and communication circuit provided by the first embodiment of the invention;
the main controller and the communication controller are electrically connected with the wireless charging and communication circuit; the power receiving controller is electrically connected with the main controller.
The third embodiment of the present invention can achieve the same beneficial effects as the first and second embodiments, and will not be described herein again.
Example four
Based on the same inventive concept, a fourth embodiment of the present invention provides a wireless electronic device, including: the wireless charging and communication circuit comprises a power supply, a main controller, a communication controller, a power supply controller and the wireless charging and communication circuit provided by the second embodiment of the invention;
the power supply, the main controller, the communication controller and the power supply controller are all electrically connected with the wireless charging and communication circuit.
The fourth embodiment of the present invention can achieve the same beneficial effects as the first and second embodiments, and will not be described herein again.
It will be understood by those within the art that each block of the block diagrams and/or flowchart illustrations, and combinations of blocks in the block diagrams and/or flowchart illustrations, can be implemented by computer program instructions. Those skilled in the art will appreciate that the computer program instructions may be implemented by a processor of a general purpose computer, special purpose computer, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, implement the features specified in the block or blocks of the block diagrams and/or flowchart illustrations of the present disclosure.
Those of skill in the art will appreciate that various operations, methods, steps in the processes, acts, or solutions discussed in the present application may be alternated, modified, combined, or deleted. Further, various operations, methods, steps in the flows, which have been discussed in the present application, may be interchanged, modified, rearranged, decomposed, combined, or eliminated. Further, steps, measures, schemes in the various operations, methods, procedures disclosed in the prior art and the present invention can also be alternated, changed, rearranged, decomposed, combined, or deleted.
The foregoing is only a partial embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.

Claims (13)

1. A wireless charging and communication circuit is characterized by comprising a receiving circuit and a signal processing circuit which are electrically connected;
the receiving circuit is used for receiving the electric energy wirelessly transmitted by the transmitting circuit and wirelessly transmitting a feedback signal to the transmitting circuit according to the electric energy;
the signal processing circuit is used for receiving a control signal which is generated according to the feedback signal and is wirelessly transmitted by the transmitting circuit, and processing the control signal;
the signal processing circuit comprises a decoding circuit, and the decoding circuit is used for receiving the control signal generated according to the feedback signal and transmitted by the transmitting circuit and decoding the control signal;
the decoding circuit includes: the circuit comprises a first signal input end, a second signal input end, a high-pass filter circuit, a switch circuit, a third capacitor, a resistance-capacitance charging circuit, a comparison circuit, a fourth capacitor and a signal output end;
the first signal input end is electrically connected with the receiving circuit and used for receiving the control signal transmitted by the transmitting circuit;
the first end of the high-pass filter circuit is electrically connected with the first signal input end, and the second end of the high-pass filter circuit is electrically connected with the first end of the switch circuit;
the second end of the switch circuit is electrically connected with the comparison circuit, and the third end of the switch circuit is grounded;
the first end of the third capacitor is electrically connected with the second signal input end, and the second end of the third capacitor is grounded;
the first end of the resistance-capacitance charging circuit is electrically connected with the second signal input end, and the second end of the resistance-capacitance charging circuit is grounded;
the comparison circuit is electrically connected with the resistance-capacitance charging circuit, the second signal input end and the first signal output end and is grounded;
and the first end of the fourth capacitor is electrically connected with the signal output end, and the second end of the fourth capacitor is grounded.
2. The circuit of claim 1, wherein the receive circuit comprises: the first energy storage unit, the first capacitor, the rectifying circuit and the feedback circuit;
the first end of the first energy storage unit is electrically connected with the first end of the first capacitor, and the second end of the first energy storage unit is electrically connected with the first end of the rectifying circuit and is used for receiving electric energy wirelessly transmitted by the transmitting circuit;
the second end of the first capacitor is electrically connected with the second end of the rectifying circuit;
the third end of the rectifying circuit is grounded and is used for converting the electric energy into direct-current voltage and outputting the direct-current voltage to the feedback circuit;
the feedback circuit is electrically connected with the rectifying circuit and used for generating a feedback signal according to the direct-current voltage and transmitting the feedback signal to the transmitting circuit.
3. The circuit of claim 2, wherein the feedback circuit comprises: the load modulation control circuit comprises a load modulation control end, a first switch unit, a load modulation resistor and a load resistor;
the load modulation control end is electrically connected with the first end of the first switch unit;
the second end of the first switch unit is electrically connected with the first end of the load modulation resistor, the third end of the first switch unit is grounded, and the first switch unit is used for receiving a load modulation signal which is input by the load modulation control end and is used for modulating the load modulation signal and conducting the circuit according to the modulation signal;
the first end of the load resistor is electrically connected with the second end of the load modulation resistor and the rectifying circuit, and the second end of the load resistor is grounded;
the load modulation resistor and the load resistor are used for modulating the resistance value of the feedback circuit according to the on-off of the first switch unit to form a feedback signal.
4. The circuit of claim 2, wherein the feedback circuit comprises: the load modulation control end, the second switch unit, the load modulation capacitor and the matching capacitor;
the load modulation control end is electrically connected with the first end of the second switch unit;
the second end of the second switch unit is electrically connected with the first end of the load modulation capacitor, and the third end of the second switch unit is grounded;
the first end of the matching capacitor is electrically connected with the second end of the first capacitor, and the second end of the matching capacitor is electrically connected with the second end of the first energy storage unit.
5. The circuit of claim 1, wherein the comparison circuit comprises a comparator and a logical negation circuit; the decoding circuit also comprises a resistance voltage division circuit;
the same-direction end of the comparator is electrically connected with the second end of the switch circuit, the reverse end of the comparator is electrically connected with the resistance voltage-dividing circuit, the power supply end of the comparator is electrically connected with the second signal input end, and the output end of the comparator is electrically connected with the first input end of the logic negation circuit;
a second input end of the logic negation circuit is electrically connected with the second signal input end, and an output end of the logic negation circuit is electrically connected with the first signal output end;
and the first end of the resistance voltage division circuit is electrically connected with the second signal input end, and the second end of the resistance voltage division circuit is grounded.
6. The circuit of claim 1, wherein the comparison circuit comprises a trigger circuit, and wherein the decoding circuit further comprises a fifth capacitor;
the low trigger end and the high trigger end of the trigger circuit are electrically connected with the second end of the switch circuit, the power supply end and the zero clearing end are electrically connected with the second signal input end, the control end is electrically connected with the first end of the fifth capacitor, the discharge end and the grounding end are grounded, and the output end is electrically connected with the first signal output end;
and the second end of the fifth capacitor is grounded.
7. A wireless electronic device, comprising: a main controller, a communication controller, a power receiving controller, and the wireless charging and communication circuit according to any one of claims 1 to 6;
the main controller and the communication controller are both electrically connected with the wireless charging and communication circuit; the power receiving controller is electrically connected with the main controller.
8. A wireless charging and communication circuit, comprising: a transmitting circuit;
the transmitting circuit is used for wirelessly transmitting electric energy to the receiving circuit according to any one of claims 1 to 6, receiving a feedback signal of the receiving circuit, and wirelessly transmitting a control signal generated according to the feedback signal to the receiving circuit, so that the decoding circuit according to any one of claims 1 to 6 receives the control signal generated according to the feedback signal and transmitted by the transmitting circuit, and decodes the control signal;
the transmission circuit includes: the control circuit is electrically connected with a power supply outside the charging and communication circuit.
9. The circuit of claim 8, wherein the control circuit comprises: the third energy storage unit, the unidirectional conduction unit, the third switching unit, the feedback detection resistor, the load modulation feedback end and the third signal input end;
the first end of the third energy storage unit is connected with the power supply, and the second end of the third energy storage unit is electrically connected with the first end of the second energy storage unit;
the first end of the unidirectional conduction unit is electrically connected with the second end of the second energy storage unit, and the second end of the unidirectional conduction unit is electrically connected with the first end of the third energy storage unit;
the first end of the third switching unit is electrically connected with the second end of the second energy storage unit, the second end of the third switching unit is electrically connected with the first end of the feedback detection resistor and the load modulation feedback end, and the third end of the third switching unit is electrically connected with the third signal input end; the third switching unit is used for controlling the on-off of the circuit according to a charging control signal input by a third signal input end;
and the second end of the feedback detection resistor is grounded.
10. The circuit of claim 9, wherein the third switching unit is a field effect transistor, and the first terminal, the second terminal and the third terminal of the third switching unit are a drain, a source and a gate of the field effect transistor, respectively;
the unidirectional conduction unit is a diode, and the first end and the second end of the unidirectional conduction unit are respectively the anode and the cathode of the diode.
11. The circuit of claim 8, wherein the control circuit comprises: the load modulation circuit comprises a fourth switching unit, a fourth signal input end, a fifth switching unit, a fifth signal input end, a third energy storage unit, a feedback detection resistor and a load modulation feedback end;
the first end of the fourth switch unit is electrically connected with the power supply, the second end of the fourth switch unit is electrically connected with the first end of the third energy storage unit, and the third end of the fourth switch unit is electrically connected with the fourth signal input end and used for controlling the on-off of the circuit according to the first charging control signal input by the fourth signal input end;
the first end of the fifth switch unit is electrically connected with the second end of the fourth switch unit, the second end of the fifth switch unit is electrically connected with the first end of the feedback detection resistor, the third end of the fifth switch unit is electrically connected with the fifth signal input end, and the fifth switch unit is used for controlling the on-off of the circuit according to a second charging control signal input by the fifth signal input end;
the first end of the feedback detection resistor is electrically connected with the load modulation feedback end, and the second end of the feedback detection resistor is grounded and used for responding to the feedback signal transmitted by the receiving circuit and outputting the feedback signal through the load modulation feedback end;
and the second end of the third energy storage unit is connected with the first end of the second energy storage unit, and the second end of the second energy storage unit is grounded.
12. The circuit of claim 11, wherein the fourth switching unit is a field effect transistor, and the first terminal, the second terminal and the third terminal of the fourth switching unit are a drain, a source and a gate of the field effect transistor, respectively;
the fifth switch unit is a field effect transistor, and the first end, the second end and the third end of the fifth switch unit are respectively a drain electrode, a source electrode and a grid electrode of the field effect transistor.
13. A wireless electronic device, comprising: a power supply, a main controller, a communication controller, a power supply controller, and the wireless charging and communication circuit of any one of claims 8-12;
the power supply, the main controller, the communication controller and the power supply controller are all electrically connected with the wireless charging and communication circuit.
CN201810530497.6A 2018-05-29 2018-05-29 Wireless charging and communication circuit and wireless electronic equipment Active CN108695956B (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
CN201810530497.6A CN108695956B (en) 2018-05-29 2018-05-29 Wireless charging and communication circuit and wireless electronic equipment
US16/622,534 US11398745B2 (en) 2018-05-29 2019-02-18 Wireless charging and communication circuit, wireless electronic device, and wireless charging and communication circuit system
PCT/CN2019/075398 WO2019227977A1 (en) 2018-05-29 2019-02-18 Wireless charging and communication circuit, wireless electronic device, and wireless charging and communication circuit system
US17/741,557 US11923717B2 (en) 2018-05-29 2022-05-11 Charging circuit and electronic device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201810530497.6A CN108695956B (en) 2018-05-29 2018-05-29 Wireless charging and communication circuit and wireless electronic equipment

Publications (2)

Publication Number Publication Date
CN108695956A CN108695956A (en) 2018-10-23
CN108695956B true CN108695956B (en) 2021-05-07

Family

ID=63848125

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201810530497.6A Active CN108695956B (en) 2018-05-29 2018-05-29 Wireless charging and communication circuit and wireless electronic equipment

Country Status (3)

Country Link
US (2) US11398745B2 (en)
CN (1) CN108695956B (en)
WO (1) WO2019227977A1 (en)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108695956B (en) * 2018-05-29 2021-05-07 京东方科技集团股份有限公司 Wireless charging and communication circuit and wireless electronic equipment
CN109687600B (en) 2018-12-20 2021-07-20 美的集团(上海)有限公司 Electronic device, wireless power transmission receiving circuit, communication method and wireless power transmission system
CN110401266B (en) * 2019-07-29 2021-02-12 歌尔股份有限公司 Wireless charging receiving end circuit and electronic equipment with wireless charging function
CN111628576A (en) * 2020-05-12 2020-09-04 西安交通大学 Radio frequency energy collection system
CN113113678B (en) * 2021-03-30 2023-04-18 东莞新能安科技有限公司 Single-wire communication circuit, battery management system, battery pack and electric device
CN114531178B (en) * 2022-01-28 2023-03-21 珠海昇生微电子有限责任公司 Charging and bidirectional communication system and method

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101458773A (en) * 2007-12-14 2009-06-17 台湾铭板股份有限公司 Pressure container apparatus for combining induction identification technology
CN101694953A (en) * 2009-10-10 2010-04-14 浙江苏泊尔家电制造有限公司 Coil coupling signal acquiring device
CN202443486U (en) * 2012-01-16 2012-09-19 福建物联天下信息科技有限公司 Electrical ink label
CN104158269A (en) * 2014-08-11 2014-11-19 长城信息产业股份有限公司 Wireless charging transmitter, receiver, charging device and wireless charging method
CN206542337U (en) * 2017-02-15 2017-10-03 国家电网公司 A kind of switching power circuit that there is overvoltage detection to protect
WO2018004130A1 (en) * 2016-06-30 2018-01-04 엘지이노텍(주) Shape of wireless power transmission coil and coil configuration method
CN107968490A (en) * 2012-09-28 2018-04-27 联发科技（新加坡）私人有限公司 Resonant radio source receiver and resonant radio source system

Family Cites Families (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6772011B2 (en) * 2002-08-20 2004-08-03 Thoratec Corporation Transmission of information from an implanted medical device
CN201492814U (en) 2009-08-17 2010-06-02 浙江大学 Wireless control micro implanted-type wireless energy supply power supply management integrated circuit chip
US9787364B2 (en) * 2011-01-20 2017-10-10 Triune Ip, Llc Multi-use wireless power and data system
JP5653137B2 (en) 2010-08-31 2015-01-14 キヤノン株式会社 Power supply apparatus and method
US9600021B2 (en) * 2011-02-01 2017-03-21 Fu Da Tong Technology Co., Ltd. Operating clock synchronization adjusting method for induction type power supply system
TWI519109B (en) * 2013-02-27 2016-01-21 凌通科技股份有限公司 Circuit for signal decoding in rfid or wireless power charging
US9391529B2 (en) * 2013-03-04 2016-07-12 Semiconductor Components Industries, Llc Power converter including a secondary synchronous rectification control module
TWI528679B (en) 2013-08-30 2016-04-01 凌通科技股份有限公司 Wireless charging circuit and abnormal state protection circuit thereof
US10474852B2 (en) * 2014-10-31 2019-11-12 Teslonix Inc. Charging long-range radio frequency identification tags
JP6650219B2 (en) * 2015-06-25 2020-02-19 ローム株式会社 Power transmission device and contactless power supply system
CN206211578U (en) 2016-10-20 2017-05-31 广州视源电子科技股份有限公司 A kind of wireless charging circuit and system
CN206406776U (en) 2017-01-05 2017-08-15 西安特锐德智能充电科技有限公司 A kind of wireless charging circuit of constant current constant voltage Compound Topology
CN106787265B (en) 2017-01-24 2019-08-02 深圳市同洁科技有限公司 A kind of wireless charging device
CN106849297A (en) 2017-03-16 2017-06-13 维沃移动通信有限公司 A kind of wireless charging circuit, wireless charger and wireless charging system
CN108695956B (en) 2018-05-29 2021-05-07 京东方科技集团股份有限公司 Wireless charging and communication circuit and wireless electronic equipment

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101458773A (en) * 2007-12-14 2009-06-17 台湾铭板股份有限公司 Pressure container apparatus for combining induction identification technology
CN101694953A (en) * 2009-10-10 2010-04-14 浙江苏泊尔家电制造有限公司 Coil coupling signal acquiring device
CN202443486U (en) * 2012-01-16 2012-09-19 福建物联天下信息科技有限公司 Electrical ink label
CN107968490A (en) * 2012-09-28 2018-04-27 联发科技（新加坡）私人有限公司 Resonant radio source receiver and resonant radio source system
CN104158269A (en) * 2014-08-11 2014-11-19 长城信息产业股份有限公司 Wireless charging transmitter, receiver, charging device and wireless charging method
WO2018004130A1 (en) * 2016-06-30 2018-01-04 엘지이노텍(주) Shape of wireless power transmission coil and coil configuration method
CN206542337U (en) * 2017-02-15 2017-10-03 国家电网公司 A kind of switching power circuit that there is overvoltage detection to protect

Also Published As

Publication number Publication date
US11398745B2 (en) 2022-07-26
US11923717B2 (en) 2024-03-05
WO2019227977A1 (en) 2019-12-05
CN108695956A (en) 2018-10-23
US20200212703A1 (en) 2020-07-02
US20220271558A1 (en) 2022-08-25

Similar Documents

Publication Publication Date Title
CN108695956B (en) Wireless charging and communication circuit and wireless electronic equipment
CN1989676B (en) Power supply device, electronic device for reducing standby power consumption and method for controlling power supply
US7382635B2 (en) Power supply apparatus, method of controlling the apparatus, and electronic device using the apparatus
US9923605B2 (en) Electronic apparatus
US20140175904A1 (en) Wireless switching circuit
CN100492852C (en) Wireless type zero quiescent dissipation power supply controller
CN102916468B (en) Battery power supply circuit, battery power supply method and mobile terminal
US8058912B2 (en) Electronic device and signal generator thereof
CN101409552B (en) Phase-locked loop and control method utilizing the same
US7684768B1 (en) Loop powered current-loop wireless transmitter
US10447345B2 (en) Circuit and method for activating an NFC device
CN104158247A (en) Power supply self-starting device for vehicle-mounted electronic equipment
JP4697338B1 (en) air conditioner
CN102428638B (en) DC-DC converter for the control of a battery charge current in portable electronic devices
CN101656418A (en) Fan system and power reverse protection device thereof
US7088164B2 (en) Semiconductor integrated circuit device and electronic appliance with power control
CN213637402U (en) Wearable bluetooth motor controller of intelligence
CN111694607B (en) Automatic starting circuit of communication module and communication module
US11652356B2 (en) Portable device communicating with charger and method of operating the same
CN110941319B (en) Automatic starting circuit of equipment and equipment
CN211506721U (en) WIFI bluetooth module with bluetooth-to-infrared function
JP2007124852A (en) Distributed power supply system
CN1585274A (en) Loop filter of phaselocked loop with initial circuit
US20090128098A1 (en) Pulse generating circuit, control method for pulse generating circuit, transmitter, and electronic device
CN205486736U (en) Wireless wiFi intelligent control module

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination
GR01 Patent grant
GR01 Patent grant